Thanks.
We learned early on that we needed two separate feeding stations for them. We try to remind Paris that we're the boss (ha! All he hears is "Blah, blah, blah, dinner, blah, blah, blah!") and often toss him from the bed when he's being a pain and try to encourage Zoe to be more assertive.
We also keep squirt guns and an air can/duster handy - mainly for when Paris decides to try to eat the plants. The thing is, when we zap him, they both get to running, even if Zoe is quietly minding her own business on the windowsill, birdwatching, while Paris is busy pruning the Kalanchoe.
It's ironic that Paris is the bully, because he is the scardy-cat of the two. Whenever anyone comes to the door, he's the first to hide. He won't come out for visitors, yet Zoe is right there, checking them out.
The window perch gets used equally - fortunately. The kitty tower is a work in progress (home made with scrap lumber and bits-n-pieces, and evolving design, done when DH gets motivated to pick up the drill (i.e., when I nag).).